Emerson Digistart IS1x0043B series User Manual

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Digistart IS User Guide 81
Issue: 4 www.controltechniques.com
10.8 Slip-ring motor
The Digistart IS can be used to control a slip-ring motor, using rotor resistance.
Figure 10-8 Slip-ring motor
08539.B
7
6
5
4
3
2
1
9
8
E
110-210 VAC
+10%
-15%
220-440 VAC
+10%
-15%
6/T3
2/T1
4/T2
5/L3
3/L2
1/L1
E
1
Control voltage
2
Remote control inputs
3
Motor thermistor input
4
RTD/PT100 input
5
24 Vdc output
6
Relay outputs
7
Analog output
8
Three-phase supply
9
Slip-ring induction motor
KM1
Changeover contactor
F1
Semiconductor fuses
(optional)
S1
Start/stop contact
S2
Reset contact
R1
Rotor resistance
(external)
Parameter settings:
 Pr 4D Relay B Action
 Select 'Changeover Contactor'
 Pr 4E Relay B On Delay
 Set this to the maximum time (5m:00s).
 Pr 13A Motor Data-1 Ramp
 Select 'Dual Ramp' (for slip-ring induction motor control)
 Pr 13D Changeover Time
 Default setting is 150 milliseconds. Set this to a value just greater than the changeover contactor (KM1) pole closing
time.
 Pr 13C Slip Ring Retard
 Default setting is 50%. Set this parameter to a value which is high enough to cause the motor to instantly accelerate
once the rotor resistance (R1) has been bridged out and low enough to avoid a motor current pulse.
NOTE
For this installation to function correctly, only use the primary motor settings. Only use the constant current start method
(Pr 2A Start Mode).

Emerson Digistart IS1x0043B series Specifications

General

Brand	Emerson
Model	Digistart IS1x0043B series
Category	Controller
Language	English